Cohort studies investigating the effects of exposures: key principles that impact the credibility of the results

Anna Miroshnychenko, Dena Zeraatkar, Mark Phillips, Sophie J. Bakri, Lehana Thabane, Mohit Bhandari, Varun Chaudhary, for the Retina Evidence Trials InterNational Alliance (R.E.T.I.N.A.) Study Group, Varun Chaudhary, Mohit Bhandari, Charles C. Wykoff, Sobha Sivaprasad, Lehana Thabane, Peter K. Kaiser, David Sarraf, Sophie J. Bakri, Sunir J. Garg, Rishi P. Singh, Frank G. Holz, Tien Yin Wong, Robyn H. Guymer